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<html> <head> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> </head> <body> <h3>Vue get first occurrence of empty string in array</h3> <div id="app"> <p>{{ arr }}</p> <p v-if="result">Position: {{result}}</p> </div> <script type="module"> const app = new Vue({ el: "#app", data() { return { arr: ['Vue js', 'React Js','' ,'Angular Js','', 'Express Js', 'Node Js'], result: '' }; }, mounted() { this.result = this.arr.indexOf('') } }) </script> </body> </html>